NDLI: Understanding the effect of polypyrrole and poly(3,4-ethylenedioxythiophene) on enhancing the supercapacitor performance of NiCo<sub>2</sub>O<sub>4</sub> electrodes

Content Provider	Royal Society of Chemistry (RSC)
Author	Huang, Xiaojuan Yang, Jianmao Hu, Junqing Liu, Xijian Xu, Kaibing Li, Shijie Liu, Qian Zou, Rujia Li, Wenyao
Copyright Year	2014
Abstract	Herein, two of the most well-known conducting polymers (CP), polypyrrole (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT), were coated onto mesoporous NiCo2O4 nanosheet arrays through an efficient and controllable electrodeposition process. We considered such a unique nanostructure to be an ideal model to accurately compare and understand the effects of PPy and PEDOT on electrochemical performances. Comparing the electrochemical performances of NiCo2O4@CP and pure NiCo2O4 electrodes, we found that the NiCo2O4@PPy electrode possesses the highest areal capacitance of 4.1 F cm−2 at 2 mA cm−2, which is significantly higher than the values obtained for the NiCo2O4@PEDOT (0.86 F cm−2) and NiCo2O4 electrodes (0.65 F cm−2). For rate capability, even at a high current density of 30 mA cm−2, an areal capacitance of 2.7 F cm−2 can be achieved for the NiCo2O4@PPy electrode. Moreover, the NiCo2O4@PPy electrode shows considerably smaller equivalent series resistance (ESR) than that of the NiCo2O4@PEDOT and NiCo2O4 electrodes. Therefore, the NiCo2O4@PPy hybrid composites are considered to be ideal supercapacitor electrode materials with enhanced electrochemical performances, which makes them suitable for many practical applications.
Starting Page	16731
Ending Page	16739
Page Count	9
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	2
Issue Number	39
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta03344b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	ESR PEDOT Polypyrrole Poly(3 4-ethylenedioxythiophene) Mesoporous material Nanosheet Electroplating Nanostructure Electrochemistry Electrode Capacitance Electric current Equivalent series resistance Supercapacitor
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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